Despite its small size, the thyroid gland plays an incredibly important role in metabolism, the functioning of the nervous system, and maintaining body temperature. Dysfunctions of this gland are the cause of various diseases and a significant decrease in the quality of life. Disorders of the thyroid gland can lead to increased or insufficient synthesis of the hormones produced. The thyroid gland helps regulate a person's metabolism by producing hormones. Problems can arise if the thyroid gland overproduces hormones, when it is known as hyperthyroidism, or does not produce enough hormones, which are called hypothyroidism. These problems can also lead to the growth of the thyroid gland, a problem called goiter. If a person is worried that he may have a thyroid disease, he should make an appointment for a KSD diagnosis at the nearest clinic.